Threshold or door-sill



L NJMOde L. M. PRATT au J. 1v1. WALKER.

THRBSHOLD OR DOOR SILL. No. 386,084. Patented July 10, 1888.

N PETERs PnnwLimngmpngr. wahingmn, D. c.

UNTTEE STATES PATENT @Erica LEWIS M. PRATT AND .I AMES M. W'ALKER, OFBELLEVILLE, KANSAS.

THRESHL OR DOOR=SILL..

SPBCFICATION forming part of Letters Patent No. 386,084, dated July l0,1888. Application led Mart-h 3, 1888. Serial No. QHLOGG. (No model.)

T0 @ZZ whom it may concern:

Be it known that we, LEwrs M. PRATT and JAMEs M. WALKER, citizens of theUnited States, residing at Belleville, in the county of Republic andState of Kansas, have invented a new and useful Improvement inThresholds or DoorSills, of which the following is aspeciiication.

Our invention has reference to thresholds or door-sills; and it consistsin the improved construction, hereinafter set forth and explained,whereby the height of the sill may be regulated so that the bottom edgeof the door can swing in close proximity thereto at all times.

In the drawings, Figure l is a perspective view of a part of ourimproved sill. Fig. 2 is a transverse section on the dotted line a' .rof Fig. l. Fig. 3 is a like view showing the parts adjusted to increasethe height of the sill.

The body A of the sill consists of a strip triangular in cross section,with its upper angular portion removed to present a horizontal top face,(t. The inclined sides of the body A are each provided with a series ofslots, b. The outer faces of said inclined sides each forms a bearingfor a plate, c, the upper edge of which is beveled to correspond withthe plane of the top face. Bolts d pass through said plates and throughthe slots b, and their threaded ends e project beyond the under side ofthe inclined portions to receive washers f and clamp-nuts g. The loweredges of the plates c are beveled to present a horizontal face to bearupon the floor.

The body A is provided with a series of openings, through which screws7i pass to secure the sill to the door. The outer faces of the body areprovided at or near their ends with a series of longitudinal notches,t', and the plates c are provided with the slots] directly over thesenotches.

The position of parts is such as they ordinarily occupy. Should thelower edge of the door be a greater distance from the tloor than usual,by reason of shrinkage or otherwise, the central screws, h, may beremoved, so that the bolts can be rotated to loosen the side plates,which can then be moved downward so that the body A can be elevatedrelative to its base. The clamp-nuts can then be tightened to rigidlyhold the parts in the doorway. Of course the improved sill can beadjusted so that the door edge can swing at all times in close proximityto the body A, thereby avoiding the undesirable draft, cracks, oropenings beneath the doors. The side plates are adjusted by insertingthe end of the screw-driver through the slotsj` into engagement with thenotches i and then using it as a lever, as will be readily understood.The construction and arrangement of parts is such that the sill will notonly be strong and durable, but can be manufactured at a very slightexpense.

The under faces of the sides adjacent to the sides of the slots b arerecessed, thereby providing the seats 7c for the washer and nut, so thateach bolt, which is provided with an ordinary screw-head, can be turnedfrom the outer side of the sill to rigidly clamp the washer and nut inits particular recess.

le claiml. The combination, in a door-sill, of the body A, havinginclined sides, plates bearing on said sides, and devices for adjustingsaid plates, substantially as described.

2. The combination, in a doorsill, ofthe body A, having inclined sidesprovided with elongated slots, plates bearing on said sides, and boltspassing th rough said plates and slots, and clamp-nuts for said bolts,substantially as described.

3. The combination, in a dooresill, of the body A, having its horizontaltop face and inclined sides slotted, as described, plates c, beveled attheir upper and lower edges, and bolts passing through said plates andslots and provided with clamp nuts, substantially as described.

4. The combination, with the body A, hav ing inclined sides slotted, asdescribed, and provided on their under side with recesses intersectingsaid slots, plates bearing on said sides, and screw-bolts passingthrough said plates and slots, and clamp-nuts engaging said bolts andresting in said recesses, substantial ly as described.

5. The combination o'l' the body A, having the inclined sides providedwith the notches t', and the side plates having the slots] over saidnotches, as set forth.

In testimony that we claim the foregoing as our own we have heretoaflixcd our signatures in presence of two witnesses.

LEVIS M. PRATT. JAMES M. VALKER.

'Vitnesses:

D. C. ALEXANDER, J. T. CoNwELL.

IOO

